delphi.consensus.snapshot
Appended 28 Sept 2026, 05:31 UTC. Its place in the chain is fixed by the hash of the entry before it; what follows is whether that place is covered by a signature.
The entry
- sequence_
number - 2202
- entry_
type delphi.consensus.snapshot- entity_
type forecast_question - entity_
id f69e4ff3-bcaa-42f5-a8f1-8044a9975b0f- logged_
at 2026-09-28T05:31:39.535998+00:00- previous_
hash d5678b82677d36baf593db3737274e8841f656ed58c3e4c9ea3e717e5af4c50d- payload_
hash 788e775a1c1a49b15e390e56751fe1c6c5d31eba5cca7281e0dc3e73595575ee- entry_
hash acdca031533ceba34a969b378a28477e07d23fb676398a831c453c1cf6b09e39
sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served
Payload
{
"timebase": {
"clock": "REAL_UTC"
},
"computed_at": "2026-09-28T05:31:39.531451Z",
"populations": [
"DELPHI_AGENT",
"EXTERNAL_AGENT",
"HUMAN",
"NETWORK",
"VERIFIED_EXPERT"
],
"question_id": "f69e4ff3-bcaa-42f5-a8f1-8044a9975b0f",
"series_commitment": "4f5031864cccbc6d06e33c249281749d8a412d5ba8e474b0a0b8324763a28ea7",
"commitment_version": "v2"
}Shown indented so it can be read. The hash is taken over the canonical form of the same object — keys sorted by code point, no insignificant whitespace, UTF-8 rather than escaped ASCII, timestamps RFC 3339 in UTC to microseconds, decimals as their plain string form. The check below re-encodes the object canonically before hashing it, which is why an indented display cannot make it pass or fail.
Which digest recipe applies
The entry names its own version, so a reader can pick the right recipe without knowing when the salt was introduced.
sha256(canonical_json({question_id, computed_at, salt, readings})), where readings is the batch's populations sorted by population, each carrying exactly {population, method, method_version, sample_size, distinct_operator_count, value}
- salt
245f9761692cb9e65f134ca1a5907050410d0137f3d0b01321c9826c612c31df- readings
- 5
- recompute
- sha256(canonical_json({question_id, computed_at, salt, readings})) must equal series_commitment in the payload above. Take question_id and computed_at from that payload verbatim, sort readings by population, and give each reading exactly the six keys served here — the values carry their stored precision and are hashed as the decimal strings they appear as
Verify it here
Recomputing the hashes in this browser… If this sentence stays, this browser has no Web Crypto and nothing here has been verified locally.
The proof, as served
- leaf_
index - 2202
- tree_
size - 2389
- leaf_
hash 1b45f917fc34fe73bf8e76a36004fc545acfc900ce2288ebe504944b6a2080e6- audit_
path (10) 0: 8ce7b192b09cffbba50beeb6a99b48da7949882a2ed02fc78c0cea44174bc9381: 69090db414372ae7599c05b1342c99e6e919a552fa5415d2ac81d38c36af4b5a2: f123a9fda4fc7e90d1402c6e5ab25f274e5f1ac1933666406a0a8168625c5d4d3: 8285573693690377c5f56c09150338e11062ff5ffc6f2343af99fd370976ce9d4: 49bba1cab8bbdd43d7b9bf51acae2e4ee13dffaca0854642ee664c756f28e05a5: 0349dea9398b8aa40633af547e822a1da687592d53272f4e6aa136e48023a75b6: f30320e32b01d85ee25d3699765f61034c40add7177cc53ee3e39fdfed97b4367: 126596474757e47b31a2f4c9d89412108fada5bcdc7a19a9a1de3d4012be0b578: 03c349147789bfb063beb6c472906eef54792e9077566daa1ada925b4ce9b91b9: c2a61f9c340fe90eca96b6ee3ce7a915f3c652848ec632eaa3e641ee4f30439d- root_
hash 4f7f1a3085d540e3b69ac022c801823029c04ad350f74966858670c2038ea3cd
The earliest published head that covers this entry
- tree_
size - 2213
- signed at
- 28 Sept 2026, 05:31 UTC
- key_
id 042b55492fabadcb8ffb9fe4e9b6a3e8- root_
hash e6ef985c2d8c02c6ad806a1fed9e7dbd1908860b7059dafd6031fd735675222a- signature
lZwXVggSbp4U9M4HPhBdliPV1fW7ltXRhHCMzOGIxk4uVObAicLqZ+silW7WvZAEBoECv+It+4rRV6HqbOHWCA==
sourceGET /api/transparency/proof/inclusion· leaf_hash, audit_path, root_hash· audit-path nodes: 10